North Korea has been working through 2016 on developing components for an intercontinental ballistic missile (ICBM), making the isolated nation's claim that it was close to a test-launch plausible, international weapons experts said on Monday.
North Korea has been testing rocket engines and heat-shields for an ICBM while developing the technology to guide a missile after re-entry into the atmosphere following a lift-off, the experts said.
While Pyongyang is close to a test, it is likely to take some years to perfect the weapon.
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